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db5fed26b2
ChangeLog:
Feedbacks from Andrew Morton:
- define TS_COMM_LEN to 32
- change acct_stimexpd field of task_struct to be of
cputime_t, which is to be used to save the tsk->stime
of last timer interrupt update.
- a new Documentation/accounting/taskstats-struct.txt
to describe fields of taskstats struct.
Feedback from Balbir Singh:
- keep the stime of a task to be zero when both stime
and utime are zero as recoreded in task_struct.
Misc:
- convert accumulated RSS/VM from platform dependent
pages-ticks to MBytes-usecs in the kernel
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Chris Sturtivant <csturtiv@sgi.com>
Cc: Tony Ernst <tee@sgi.com>
Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/*
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* tsacct.c - System accounting over taskstats interface
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*
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* Copyright (C) Jay Lan, <jlan@sgi.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/tsacct_kern.h>
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#include <linux/acct.h>
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#include <linux/jiffies.h>
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#define USEC_PER_TICK (USEC_PER_SEC/HZ)
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/*
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* fill in basic accounting fields
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*/
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void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
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{
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struct timespec uptime, ts;
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s64 ac_etime;
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BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
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/* calculate task elapsed time in timespec */
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do_posix_clock_monotonic_gettime(&uptime);
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ts = timespec_sub(uptime, current->group_leader->start_time);
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/* rebase elapsed time to usec */
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ac_etime = timespec_to_ns(&ts);
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do_div(ac_etime, NSEC_PER_USEC);
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stats->ac_etime = ac_etime;
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stats->ac_btime = xtime.tv_sec - ts.tv_sec;
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if (thread_group_leader(tsk)) {
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stats->ac_exitcode = tsk->exit_code;
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if (tsk->flags & PF_FORKNOEXEC)
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stats->ac_flag |= AFORK;
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}
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if (tsk->flags & PF_SUPERPRIV)
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stats->ac_flag |= ASU;
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if (tsk->flags & PF_DUMPCORE)
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stats->ac_flag |= ACORE;
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if (tsk->flags & PF_SIGNALED)
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stats->ac_flag |= AXSIG;
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stats->ac_nice = task_nice(tsk);
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stats->ac_sched = tsk->policy;
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stats->ac_uid = tsk->uid;
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stats->ac_gid = tsk->gid;
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stats->ac_pid = tsk->pid;
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stats->ac_ppid = (tsk->parent) ? tsk->parent->pid : 0;
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stats->ac_utime = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
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stats->ac_stime = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
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stats->ac_minflt = tsk->min_flt;
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stats->ac_majflt = tsk->maj_flt;
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strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
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}
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#ifdef CONFIG_TASK_XACCT
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#define KB 1024
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#define MB (1024*KB)
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/*
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* fill in extended accounting fields
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*/
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void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
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{
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/* convert pages-jiffies to Mbyte-usec */
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stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB;
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stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB;
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if (p->mm) {
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/* adjust to KB unit */
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stats->hiwater_rss = p->mm->hiwater_rss * PAGE_SIZE / KB;
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stats->hiwater_vm = p->mm->hiwater_vm * PAGE_SIZE / KB;
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}
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stats->read_char = p->rchar;
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stats->write_char = p->wchar;
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stats->read_syscalls = p->syscr;
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stats->write_syscalls = p->syscw;
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}
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#undef KB
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#undef MB
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/**
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* acct_update_integrals - update mm integral fields in task_struct
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* @tsk: task_struct for accounting
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*/
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void acct_update_integrals(struct task_struct *tsk)
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{
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if (likely(tsk->mm)) {
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long delta = cputime_to_jiffies(
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cputime_sub(tsk->stime, tsk->acct_stimexpd));
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if (delta == 0)
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return;
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tsk->acct_stimexpd = tsk->stime;
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tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
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tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
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}
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}
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/**
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* acct_clear_integrals - clear the mm integral fields in task_struct
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* @tsk: task_struct whose accounting fields are cleared
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*/
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void acct_clear_integrals(struct task_struct *tsk)
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{
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tsk->acct_stimexpd = 0;
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tsk->acct_rss_mem1 = 0;
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tsk->acct_vm_mem1 = 0;
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}
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#endif
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